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	Intercomparison of two cavity ring-down spectroscopy analyzers for atmospheric (co2)-c-13/(co2)-c-12 measurement
	Pang, Jiaping1,2; Wen, Xuefa1,2; Sun, Xiaomin1,2; Huang, Kuan3
刊名	Atmospheric measurement techniques
	2016-08-22
卷号	9期号:8页码:3879-3891
ISSN号	1867-1381
DOI	10.5194/amt-9-3879-2016
通讯作者	Wen, xuefa(wenxf@igsnrr.ac.cn) ; Sun, xiaomin(sunxm@igsnrr.ac.cn)
英文摘要	Isotope ratio infrared spectroscopy (iris) permits continuous in situ measurement of co2 isotopic composition under ambient conditions. previous studies have mainly focused on single iris instrument performance; few studies have considered the comparability among different iris instruments. in this study, we carried out laboratory and ambient measurements using two picarro co2 delta c-13 analyzers (g1101-i and g2201-i (newer version)) and evaluated their performance and comparability. the best precision was 0.08-0.15% for g1101-i and 0.01-0.04% for g2201-i. the dependence of delta c-13 on co2 concentration was 0.46% per 100 ppm and 0.09% per 100 ppm, the instrument drift ranged from 0.92-1.09% and 0.19-0.37 parts per thousand, and the sensitivity of delta c-13 to the water vapor mixing ratio was 1.01 parts per thousand/% h2o and 0.09 parts per thousand/% h2o for g1101-i and g2201-i, respectively. the accuracy after correction by the two-point mixing ratio gain and offset calibration method ranged from -0.04-0.09 parts per thousand for g1101-i and 0.13-0.03 parts per thousand for g2201-i. the sensitivity of delta c-13 to the water vapor mixing ratio improved from 1.01% / % h2o before the upgrade of g1101-i (g1101-i-original) to 0.15% / % h2o after the upgrade of g1101-i (g1101-i-upgraded). atmospheric delta c-13 measured by g1101-i and g2201-i captured the rapid changes in atmospheric delta c-13 signals on hourly to diurnal cycle scales, with a difference of 0.07 +/- 0.24% between g1101-i-original and g2201-i and 0.05 +/- 0.30% between g1101-i-upgraded and g2201-i. a significant linear correlation was observed between the delta c-13 difference of g1101i-original and g2201-i and the water vapor concentration, but there was no significant correlation between the delta c-13 difference of g1101-i-upgraded and g2201-i and the water vapor concentration. the difference in the keeling intercept values decreased from 1.24% between g1101-i-original and g2201-i to 0.36% between g1101-i-upgraded and g2201-i, which indicates the importance of consistency among different iris instruments.
WOS关键词	LASER ABSORPTION-SPECTROSCOPY ; CARBON-DIOXIDE ; STABLE-ISOTOPES ; WATER-VAPOR ; FTIR SPECTROSCOPY ; TRACE-GAS ; CO2 ; SPECTROMETER ; RATIO ; CALIBRATION
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000383790400002
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2376166
专题	中国科学院大学
通讯作者	Wen, Xuefa; Sun, Xiaomin
作者单位	1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Picarro Inc, Santa Clara, CA 95054 USA
推荐引用方式 GB/T 7714	Pang, Jiaping,Wen, Xuefa,Sun, Xiaomin,et al. Intercomparison of two cavity ring-down spectroscopy analyzers for atmospheric (co2)-c-13/(co2)-c-12 measurement[J]. Atmospheric measurement techniques,2016,9(8):3879-3891.
APA	Pang, Jiaping,Wen, Xuefa,Sun, Xiaomin,&Huang, Kuan.(2016).Intercomparison of two cavity ring-down spectroscopy analyzers for atmospheric (co2)-c-13/(co2)-c-12 measurement.Atmospheric measurement techniques,9(8),3879-3891.
MLA	Pang, Jiaping,et al."Intercomparison of two cavity ring-down spectroscopy analyzers for atmospheric (co2)-c-13/(co2)-c-12 measurement".Atmospheric measurement techniques 9.8(2016):3879-3891.

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